package xin.printk.android.utils;

import java.util.Random;

public class NumberUtils {

    public static String generateVerifyCode(int len) {
        String source = "2695417803";
        Random random = new Random();
        StringBuilder builder = new StringBuilder();
        for (int i = 0; i < len; i++) {
            builder.append(source.charAt(random.nextInt(9)));
        }
        return builder.toString();
    }
}
